I have been using this serum for about two weeks and by the third hair wash it seemed like there was about a third less hair loss than before use.
The serum is easy to use. By pressing and releasing the soft silicone top, the pipette fills up to the marked line. If there is a little too much, I gently pressed on the top so that a bit ran back into the glass.
Then I distributed it in 1/4 of the scalp on towel-dried hair and repeated this three more times. Then I gently massaged with my fingertips so it was distributed in the scalp.
There is nothing to feel when the hair is dry. The hair does not feel heavy or greasy. The serum is clear and has no noticeable scent.
Personally, I am satisfied with the design. Kérastase has always had a beautiful design in my eyes and I think the color choice is nice.